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1999 XJ123

asteroid
Thing Asteroid Q15189473

Facts

24 properties
Instance of
asteroid
Follows
1999 XG121[3]
Followed by
(75427) 1999 XK123[4]
Absolute magnitude
+14.95[10]
Albedo
+0.311[21]
Apoapsis
+2.528693233683921[16]
Argument of periapsis
+207.9301598288891[18]
Diameter
+2.735[20]
Discoverer or inventor
Catalina Sky Survey[1]
Epoch
November 21, 2025[22]
Longitude of ascending node
+346.5455362268763[14]
Mean anomaly
+233.5596845533562[19]
Minor planet group
asteroid belt[5]
Orbital eccentricity
+0.05731057478975428[9]
Orbital inclination
+6.607136646714705[11]
Orbital period
+1350.948466818756[12]
Parent astronomical body
Sun[6]
Periapsis
+2.254562119998228[17]
Provisional designation
1999 XJ123[7]
Rotation period
+7.45[13]
Semi-major axis of an orbit
+2.391627676841074[15]
Site of astronomical discovery
Catalina Station[2]
Time of discovery or invention
December 7, 1999[8]
Time of periapsis
+2461474.9843063797[23]
🏷️ Also known as
ru 1999 XJ123 zh 小行星75426
🔖 Identifiers · 2
JPL Small-Body Database SPK-ID
20075426
Minor Planet Center body ID
75426

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References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [1] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  2. [2] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [3] ↑ . wikidata.org.
  4. [4] ↑ . wikidata.org.
  5. [5] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  6. [6] ↑ . wikidata.org.
  7. [7] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  8. [8] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  9. [9] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  10. [10] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  11. [11] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  12. [12] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  13. [13] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  14. [14] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  15. [15] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  16. [16] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  17. [17] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  18. [18] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  20. [20] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  21. [21] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  22. [22] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  23. [23] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.

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Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). 1999 XJ123. Retrieved October 29, 2026, from https://4ort.xyz/entity/q15189473
MLA “1999 XJ123.” 4ort.xyz Knowledge Graph, 4ort.xyz, 29 Oct. 2026, https://4ort.xyz/entity/q15189473.
BibTeX @misc{4ortxyz_q15189473_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{1999 XJ123}}, year = {2026}, url = {https://4ort.xyz/entity/q15189473}, note = {Accessed: 2026-10-29}}
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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 23w ago · LiMrBot bot · 2026-06-05 view diff on Wikidata ↗
    Apoapsis → 2.528693 astronomical unit
    Provisional designation → 1999 XJ123
    JPL Small-Body Database SPK-ID → 20075426
    Periapsis → 2.254562 astronomical unit
    + 23 other properties edited (see Wikidata diff for full list)
    "Removed claim: Absolute magnitude: 14.93"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.